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Loans - Recorded Investment in Financing Receivable Modified as TDR Within 12 Month (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($) contracts | Dec. 31, 2016 USD ($) contracts | Dec. 31, 2015 USD ($) contracts
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | 64 | 97 | 67
Recorded Investment | $ | $ 1,235 | $ 3,798 | $ 2,854
Commercial, financial and agricultural |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | 0 | 7 | 1
Recorded Investment | $ |  | $ 419 | $ 1
Commercial real estate |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | 2 | 5 | 1
Recorded Investment | $ | $ 82 | $ 843 | $ 626
Commercial |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | 0 | 0 | 0
Mortgage |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | 0 | 0 | 0
Recorded Investment | $ | $ 0 |  |
Installment |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | 0 | 0 | 0
Recorded Investment | $ | $ 0 |  |
Commercial |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | 2 | 7 | 3
Recorded Investment | $ | $ 117 | $ 848 | $ 1,005
Mortgage |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | 6 | 15 | 12
Recorded Investment | $ | $ 467 | $ 1,201 | $ 682
HELOC |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | 4 | 0 | 1
Recorded Investment | $ | $ 194 |  | $ 5
Installment |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | 0 | 1 | 2
Recorded Investment | $ | $ 0 | $ 3 | $ 101
Leases |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | 50 | 62 | 47
Recorded Investment | $ | $ 375 | $ 484 | $ 434
Leases |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Number of Contracts | 0 | 0 | 0
Recorded Investment | $ | $ 0 |  |

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- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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- Definition Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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